A malignant neoplasm involving the adrenal medulla. The disease is adrenal medulla cancer (MONDO_0003606). Also known as: cancer of adrenal medulla, malignant adrenal medulla neoplasm, malignant adrenal medulla tumor, malignant adrenal medulla tumour, malignant neoplasm of adrenal medulla, malignant neoplasm of the adrenal medulla, malignant tumor of adrenal medulla, malignant tumor of the adrenal medulla.